Solutions by everydaycalculation.com
1st number: 1/21, 2nd number: 1 3/7
121 - 107 is -2921.
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Related: 2/21-10/7 1/21-20/7 1/42-10/7 1/21-10/14 3/21-10/7 1/21-30/7 1/63-10/7 1/21-10/21 5/21-10/7 1/21-50/7 1/21-10/35 7/21-10/7 1/21-70/7 1/21-10/49
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